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We present our attempts to detect magnetic fields in filamentary large-scale structure (LSS) by observing polarized synchrotron emission emitted by structure formation shocks. Little is known about the strength and order of magnetic fields…

Astrophysics · Physics 2009-11-13 Shea Brown , Lawrence Rudnick , Damon Farnsworth

We report a plasma-based strong THz source generated by using intense femtosecond laser pulses to irradiate solid targets at relativistic intensity >10^18W/cm2. Energies up to 50 microJ/sr per THz pulse is observed in the specular direction…

The reflection of an optical wave from a metal, arising from strong interactions between the optical electric field and the free carriers of the metal, is accompanied by a phase reversal of the reflected electric field. A far less common…

Magnetic fields generated by capacitor-coil targets driven by intense short-pulse lasers have been characterized using ultrafast proton radiography. A 1-kJ, 15-ps laser at a center wavelength of 1053 nm irradiated the back plate of the…

A method for the generation of ultrarelativistic electron beams with high spin polarization is put forward, where a tightly-focused linearly-polarized ultraintense laser pulse interacts with a nonprepolarized transverse-size-tailored solid…

Plasma Physics · Physics 2024-06-11 Xiaofei Shen , Zheng Gong , Karen Z. Hatsagortsyan , Christoph H. Keitel

The work considers an optical scheme for collimation of high-energy proton beams using $\sim 10^5$~T scale magnetic fields induced in a miniature "snail" target by petawatt or multi-petawatt laser irradiation in ps or fs regime. Such…

Plasma Physics · Physics 2025-01-28 N. Bukharskii , Ph. Korneev

Magnetic fields are observed everywhere in the universe. In this review, we concentrate on the observational aspects of the magnetic fields of Galactic and extragalactic objects. Readers can follow the milestones in the observations of…

Astrophysics · Physics 2014-10-13 J. L. Han , R. Wielebinski

As a new-generation light source, free-electron lasers (FELs) provide high-brightness X-ray pulses at the angstrom-femtosecond space and time scales. The fundamental physics behind the FEL is the interaction between an electromagnetic wave…

Accelerator Physics · Physics 2021-08-02 Jiawei Yan , Nanshun Huang , Haixiao Deng , Bo Liu , Dong Wang , Zhentang Zhao

In this work, near-field imaging by two strongly coupled arrays of split ring resonators is analyzed. A simple theoretical model is developed to obtain the transfer function of the lens. This model shows that magnetoinductive surface waves…

Optics · Physics 2009-11-13 Manuel J. Freire , Ricardo Marques

M dwarfs are known to generate the strongest magnetic fields among main-sequence stars with convective envelopes, but the link between the magnetic fields and underlying dynamo mechanisms, rotation, and activity still lacks a consistent…

Results are reported of an experiment performed at the Eclipse laser facility in CELIA, Bordeaux, on the generation of strong electromagnetic pulses. Measurements were performed of the target neutralization current, the total target charge…

Plasma Physics · Physics 2018-07-11 P. Rączka , J. -L. Dubois , S. Hulin , M. Rosiński , A Zaraś-Szydłowska , J Badziak

When two-dimensional electron gases (2DEGs) are exposed to magnetic field, they resonantly absorb electromagnetic radiation via electronic transitions between Landau levels (LLs). In 2DEGs with a Dirac spectrum, such as graphene, theory…

Strongly Correlated Electrons · Physics 2019-07-15 Ievgeniia O. Nedoliuk , Sheng Hu , Andre K. Geim , Alexey B. Kuzmenko

A novel scheme for generating powerful terahertz (THz) radiation based on laser-solid interactions is proposed. When a $p$-polarized femtosecond laser impinges obliquely on a plane solid target and the target partially blocks the laser…

Plasma Physics · Physics 2020-09-02 Ke Hu , Longqing Yi

Well-motivated extensions of the standard model predict ultra-light and fundamental pseudo-scalar particles (e.g., axions or axion-like particles: ALPs). Similarly to the Primakoff-effect for axions, ALPs can mix with photons and…

High Energy Physics - Phenomenology · Physics 2018-05-02 Jhilik Majumdar , Francesca Calore , Dieter Horns

Precise control of light-matter interactions at the nanoscale lies at the heart of nanophotonics. Experimental examination at this length scale is challenging, however, since the corresponding electromagnetic near-field is often confined…

The uncertainty about a possible correlation between strength and inclination of the magnetic field and the continuum intensity of the sunspot penumbral fine-structure has been removed by a detailed analysis of a spatially very high…

Solar and Stellar Astrophysics · Physics 2016-05-26 E. Wiehr

We report on a giant Faraday effect in an electron plasma in n-InSb probed via polarization-resolved terahertz (THz) time-domain spectroscopy. Polarization rotation angles and ellipticities reach as large as {\pi}/2 and 1, respectively,…

Optics · Physics 2012-08-24 T. Arikawa , X. Wang , A. A. Belyanin , J. Kono

Proton imaging is a powerful tool for probing electromagnetic fields in a plasma, providing a path-integrated map of the field topology. However, in cases where the field structure is highly inhomogeneous, inferring spatial properties of…

Plasma Physics · Physics 2019-10-10 Joseph Levesque , Carolyn Kuranz , Timothy Handy , Mario Manuel , Frederico Fiuza

The magnetic properties of Fe/Ag granular multilayers were examined by SQUID magnetization and Mossbauer spectroscopy measurements. Very thin (0.2 nm) discontinuous Fe layers show superparamagnetic properties that can be tailored by the…

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